74 



R. HUYS AND W. LEE 



Applanola hirsuta (Thompson & A. Scott, 1903) comb, 

 nov. 



Laophonte hirsuta Thompson & A. Scott, 1903 



Esola hirsuta (Thompson & A. Scott, 1903): Lang (1948) 



Thompson & A. Scott (1903) described Laophonte hirsuta from 

 washings of pearl oysters and other unidentified invertebrates dredged 

 in the Gulf of Manaar, Sri Lanka. A. Scott (1909) reported the species 

 from 1595 m in the Banda Sea (Indonesia) but this record is almost 

 certainly the result of contamination by a shallow water sample (Lang, 

 1948; Lee & Huys, 1999). The unknown male was described by 

 Gurney (1927) from Port Taufiq in the Suez Canal. Por's (1964b) 

 records from Haifa Bay and off the coast of Caesarea are likely the 

 result of Lessepsian migration. Both Krishnaswamy (1957) and 

 Krishna Murty (1983) reported the species from the Bay of Bengal. 

 Krishnaswamy collected adults and developmental stages from 

 sponges taken off the Krusadai Islands. Krishna Murty reported some 

 occasional specimens in algal washings from the Visakhapatnam 

 coast. The only other record outside the Indo-Pacific is that by Pesta 

 (1916) from Sao Tome in the Gulf of Guinea. Lang (1944, 1948) 

 placed the species in the longicauda-gwup of Esola. 



Type locality. Muttuvaratu, Sri Lanka; washings of pearl oys- 

 ters and other dredged invertebrates. 



Material examined. Cambridge Suez Canal Expedition 1924; 

 Port Taufiq (Egypt): 1 9 dissected on 14 slides (BMNH 1999.982), 

 1 6 dissected on 11 slides (BMNH 1999.983); 3 99(1 damaged), 2 

 66 and 1 copepodid V 6 in alcohol (BMNH 1928.4.2.111). 



Redescription. 



FEMALE. Body length from anterior margin of rostrum to posterior 

 margin of caudal rami 664 um (n=3; range: 650-690 pm). Maxi- 

 mum width (28 1 um) measured at posterior margin of cephalothorax. 



Body very dorsoventrally depressed, covered with dense pattern 

 of minute spinules dorsally (Fig. 30A). Cephalothorax much wider 

 than free somites, posterolateral angles backwardly produced; with 

 paired cup-shaped pores both anterodorsally and anteroventrally on 

 either side of rostrum (arrowed in Fig. 15A-B and 30A-B), 

 anterodorsal set partly closed off by fringe of setular extensions. 

 Posterior margin of cephalothorax and all body somites with row of 

 long spinules dorsally and laterally. Ventrolateral areas of cephalic 

 shield and pleurotergites of first two pedigerous somites with long 

 spinules and setules (Fig. 3 IB; ventral surface with distinct vent- 

 pore at level of mandibles (Fig. 3 IB). Pleurotergite of P5-bearing 

 somite wide. 



Genital double-somite (Fig. 17A-B) only slightly narrower than 

 pedigerous somites (Fig. 15 A); original segmentation marked by 

 bilateral constriction and dorsal transverse spinule row; anterior (= 

 genital) half with large cup-shaped pores laterally (Fig. 29A), each 

 partly closed off by fringe of setular extensions (Fig. 29B-C); 

 posterior half with backwardly directed lobate extensions bearing 

 spinular tuft (Fig. 29 A); ventral surface without spinular ornamen- 

 tation except for spinule row around posterior margin; genital field 

 located near anterior margin. Sixth legs (Fig. 17C) forming well 

 developed opercula closing off paired genital apertures; each with 

 naked seta and 2 small processes at outer corner; inner corner 

 produced into paired, medially directed, spinous processes. 



Postgenital somites with spinules around ventral hind margin; 

 second abdominal somite with posteriorly directed lateral angles, 

 bearing spinular tuft; penultimate and anal somites distinctly nar- 

 rower. Anal somite with paired oblique spinule rows on ventral 

 surface; anal operculum spinulose. 



Caudal rami (Fig. 15A, C) widely separated; shorter than wide; 



inner margin with medial protrusion; ventral surface with 2 spinule 

 rows and large slit-like pore (arrowed in Figs. 15C; 30C) connected 

 with spacious subsurface duct, extending into anal somite; entrance 

 to pore with fine setules (Fig. 30D); dorsal surface with minute 

 spinules; setae I— III all well developed, naked and closely set; setae 

 IV and V pinnate and with fracture planes, seta V twice as long as 

 seta IV; setae VI-VII naked. 



Rostrum (Fig. 15 A) large, rounded anteriorly; partly delimited at 

 base by transverse surface suture (Fig. 30A); with paired sensillae 

 anteriorly. 



Antennule (Figs 15 A; 16A) short, 6-segmented, without proc- 

 esses on segments 1-2. Segment 1 with dorsal spinular patch. 

 Armature formula: 1-[1 pinnate], 2-[4 + 4 pinnate], 3-[2 + 2 pin- 

 nate], 4-[(2 + ae)], 5-[l], 6-[6 + 3 pinnate + acrothek]. Acrothek 

 consisting of aesthetasc and 2 naked setae; set on apical pedestal. 



Antenna (Fig. 16B) with well developed exopod bearing 2 lateral 

 and 2 apical pinnate elements. Allobasis with pinnate abexopodal 

 seta accompanied by setular patch. Endopod with lateral armature 

 consisting of 2 spines and 1 seta; distal armature consisting of 2 

 unipinnate spines and 3 geniculate setae (outermost shortest and 

 fused basally to setule). 



Labrum with elaborate ornamentation around distal margin (Fig. 

 20E) but without spinules or scales on anterior face (Fig. 29D). 



Mandible (Fig. 16C) with elongate gnathobase and long 1 -seg- 

 mented palp (Fig. 3 IB) probably representing fused basis and 

 endopod; with 1 lateral and 3 distal pinnate setae. 



Paragnaths densely hirsute lobes as in Fig. 20D. 



Maxillule (Fig. 16D) with well developed praecoxa bearing 1 seta 

 on anterior surface and 8 elements around distal margin. Coxal 

 endite with 2 setae, basal endite with 1 spine and 2 setae. Exopod an 

 elongate segment with 2 distal setae; endopod incorporated into 

 basis, represented by 2 setae. 



Maxilla (Fig. 20F). Syncoxa with long coarse spinules around 

 outer margin; with 3 endites; praecoxal endite small and unisetose; 

 middle endite drawn out into pinnate claw, with 2 setae; distal endite 

 with 3 elements. Allobasis produced into strong curved claw; acces- 

 sory armature consisting of 1 spine and 1 seta. Endopod a minute 

 segment with 4 setae of different lengths. 



Maxilliped (Fig. 17D) compact, with relatively short basis and 

 endopodal claw. Syncoxa with 2 pinnate setae. Basis with spinular 

 ornamentation as figured. Endopod represented by unipinnate claw 

 bearing 1 accessory seta and tube-pore at base. 



PI (Fig. 19E) with narrow coxa and basis. Basis with pinnate seta 

 on anterior surface and along outer margin. Exopod 2-segmented, 

 small compared to endopod; exp-1 with pinnate outer seta; exp-2 

 with 3 distinctly pinnate outer setae and 2 geniculate setae apically. 

 Endopod robust; enp-1 with long setules along inner margin; enp-2 

 with short, hook-like, naked claw and small accessory seta. 



P2-P4 (Figs 17F; 18 A, C) with 3-segmented exopods and 2- 

 segmented endopods. P2 basis with very long, multipinnate outer 

 spine; P3-P4 bases with bare outer seta. P2-P4 exp-2 with well 

 developed inner seta. P2-P4 enp- 1 small, with inner seta. P2 enp-2 

 without outer spine; outer spine of P3-P4 enp-2 very long. Tube- 

 pore present near distal outer corner of P3-P4 enp-2. Armature 

 formula as for genus. 



P5 (Fig. 17E). Endopodal lobe reduced, not extending beyond 

 proximal outer setae of exopod; with 1 short and 1 long pinnate seta 

 apically, and 2 long widely separated setae along inner margin; 

 anterior face with 2 tube-pores. Exopod elongate, produced apically 

 into tubular extension bearing 1 bare seta; inner margin with 1 , outer 

 margin with 4 pinnate setae; inner seta much shorter than apical one. 

 Both baseoendopod and exopod with elaborate ornamentation pat- 

 tern as figured. 



